[SIPForum-discussion] Transferring large MIME attachments within the SIP MESSAGE request.

[Jonathan Rosenberg]

Try MSRP:
http://www.ietf.org/internet-drafts/draft-ietf-simple-message-sessions-14.txt

-Jonathan R.

Onur Cinar wrote:

> 
> Hi,
> 
> I am working on a SIP based client side application that will be sending 
> and receiving rich instant messages (embedded pictures and audio).
> 
> The generated instant messages will be MIME encapsulated, and they will 
> be transported through SIP MESSAGE requests.
> 
> Regarding the RFC 3438, the size of a MESSAGE request should not exceed 
> 1300 bytes due to MTU limitations. Based on that, transferring the 
> embedded elements through SIP MESSAGE requests does not seem like an 
> efficient way.
> 
> I am trying to follow the RFCs as much as possible in order to be 
> compatible with 3rd party proxies.
> 
> So, rather than using a proprietary transport mechanism between clients 
> for transferring those embedded elements outside SIP signaling; I wanted 
> to ask for your comments on what would be the most convenient way of 
> doing this with SIP only messaging/transport.
> 
> I thought about sending unique IDs for each embedded element within the 
> SIP MESSAGE requests, and expecting the other client to initiate a set 
> of subsequent INVITE requests (with TFTP/FSP/... media types) to fetch 
> those referred elements?
> 
> Thanks in advance for your help,
> 
> Best regards,
> -Onur
> 
> ---
> A. Onur Cinar
> Senior Software Engineer
> ARGELA Technologies
> http://www.argela.com.tr
> 
> 
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-- 
Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
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Cisco Systems
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